Slider bending machine



Nov. 16, 1948; L. M. RABlN OWlTZ SLIDER BENDING MACHINE Filed March 27, 1946 s Sheets-Sheet 1 Nov. 16, 1948. I... M. RABINOWITZ SLIDER BENDING MACHINE 6 Sheets-Sheet 3 Filed March 27, 1946 s g d a Z S w QM W QJ 2 3 INVENTOR ATTORNE Nov. 16, 1948. L, M. RABINOWITZ 2,

' SLIDER BENDING MACHINE Filed March 27, 1946 6 Sheets-Sheet 4 36 iNVENTOR fl ATTORNEY Nov. 16, 1948- L. M. RABINOWITZ SLIDER BENDING' MACHINE 6 Sheets-Sheet 5 Filed March 2'7, 1946 INVENTOR.

A T T016 E) Nov. 16, 1948. L. M. RAB INOWlTZ v ,45

- v SLIDER BENDING MACHINE Filed March 27, 1946 s Sheets-Sheet e A )1/ INVENTOR. BY. I a

1/ ATTOK/VEY Patented Nov. 16, 1948 UN I TED STATES PATENT OFF ICE 2,453,860

SLIDERBENDING MAECH IN-E Louis M. Itabinowitz, Brooklyn, "N. Y., assigno'r fto Lamar Slide Fastener Corporation, New York,

N. Y., a corporation of New York Application March -27, 1946,-Serial No. 657,482 7 '14 Claims. 1

This invention relates to the manufacture of sliders for slide fasteners and more specifically to means for bending preformed sliders to the final shape required for the proper operation of the sliders in the fasteners.

It is well known that the sliders, usually produced from sheet metal, are formed with "two wing sections having side flanges and interconnected by a web portion or neck of the slider. In the final form of the slider, the wing sections are in spaced parallel relationship to one another and the side flanges thereof cooperate to 'form channels adapted to guide anddisplace the interlocking elements or scoops of the fastener to close or open the same in the movement of the slider.

According to a common method of manufacturing sliders, the material is first suitably treated to produce a fiat structure defining the wings and the neck of the slider, that is, to form an open or distended slider; the distended slider is then subjected to a bending or folding operation to displace the wings relative to the neck to their final position, after which the neck portion is usually provided with a V-sh'aped reinforcement, or the like, to stiffen the slider against compression or expansion forces tending to displace "the wings when the slider is in use. Alternatively the neck reinforcement may be directly formed in the blank metal prior to the production of the distended slider therefrom. In another method of manufacture, the material is subjected to'operations that result in the formation of a reinforced and already partially folded slider, wherein the wings extend at an angle of less than 90 to one another, after which the formation of the slider is completed by means of a final bending operation whereby the Wings of the sliders are brought to their final parallel position in predetermined spaced relation.

It is the general object of the invention to provide a novel and improved mechanism for performing the final bendin operation aforesaidon preformed, partially folded sliders, which is of simple and compact construction as compared with analogous devices of the prior art, reliable in operation, and capable of functioning satisfactorily over a prolonged period of time. Particularly, an object is to provide novel and simplified means for controlling the deformation of the sliders during the bending operation.

More specifically, it is an object of the invention to provide novel and improved mechanism for transporting the partially folded sliders from a point of feeding to a point at which the final bending operation takes place, and for positively controlling the amount of deformation of the sliders under the action of a suitable punch at the point of bending, to insure that the correct final shape of the slider is obtained.

Another object is to provide a rotary assembly 2 incorporating means 'for transporting the sliders to the point of bending and an element for each slider movable, during the travel of the slider to the point of bending, to a final position relative to the slider in which the element functions both as a slider-holding element and as an anvil cooperating with the bending punch in the slider bending operation.

Further, it is an object to provide elements functioning as aforesaid, which are adapted to extend into the partially folded sliders at the point of bending and are sha ed to provide therein surfaces limiting the deformation of "the sliders to theamount required to define the correct final relative position of the slider wings.

These and other objects will become apparent in the following description of the invention illustrated in the drawings, wherein:

Fig. 1 is a front elevational view of a sli'derbendingmachine according to the invention.

2 is a ,topplan viewof the machine of Fig. 1 with the upper structure thereof removed and parts of the remaining structure broken off to show underlying elements.

Figs. 3A-3B are parts of an enlarged vertical sectional view through .the machine on line 3- 3 of Fig. 2, interrupted along the match line M-M, illustrating the slider bending means.

Fig. 4 is aperspective View of a preformed partially folded slider in condition for feeding to the machine. V

Fig. 5 is a perspective View of the same slider after the final bending operation.

Fig. 6 is a fragmentary vertical sectional view,

' similar to Fig. 3 and showing part ofthe structure illustrated in the latter figure, with slider bending means inoperative position.

Fig. 7 is .a similar fragmentary vertical sectional view, showing slider bending means in inoperative position.

Fig. 8 is an elevational view, partly in vertical section, of a rotatable member forming part of .the means for transporting the sliders from a point of feedin to a .pointrof bending.

Fig. .9 is a bottom plan view of the Fig. 8.

Fig. 10 is a fragmentary enlarged top plan view member of got a grooved ring forming part of the slidertransportin'g means.

Fig. '11 is a. fragmentary enlarged :elevational view, partly in section, illustrating a slider and means cooperating to bend the slider into final shape at the completion of the bending operation.

Fig. 1-2 is a top plan view of one of the elements or arbors slidable in the grooves of the ring of Fig. 1-0, which cooperate in the bending of the sliders.

Fig. 13 is aside elevational view of the element of Fig. 12.

Fig. 14 is a vertical section on line l4--|4 of Fig. 11.

Fig. is an end elevational view of the portion of the grooved ring of Fig. 10 with the element of Fig. 12 mounted thereon.

Referring now in detail to the drawings, It] indicates a stationary table consisting of a plate which is suitably supported in a fixed horizontal position, being secured, for instance, to a standard press. The table is centrally apertured to receive a bushing 12 suitably fixed thereto, wherein there is mounted a spindle l4. Keyed and fastened to the upper end of said spindle above the table ID, as by the nut I5, is a circular member or plate l6 forming part of a rotary slidertransporting assembly hereinafter described. Similarly keyed and fastened to the lower end of the spindle M, as by means of a nut, l8, underneath the table ill is a ratchet wheel which is actuated to rotate the spindle l4 and the slider transporting assembly associated therewith, in the manner later described.

Referring now to Figs. 3A-3B and 8-9, it will be seen that the member 46 is provided with a central recessed portion 22, the top wall whereof has an opening 23 to receive the upper end of the spindle 14, to which the member is fastened, said recessed portion defining in the member an annular portion 24 extending to the table It when the member is mounted on the spindle l4. The recessed portion 22 receives a stationary cam 25 which consists of a cam element 26, suitably fixed to the upper face of the table and having a peripheral flange 21, and of a smaller cam element 28 superimposed upon the element 25 in spaced I relation to the flange 21 thereof to define with this latter a cam groove 30 for the purpose hereafter apparent.

The annular portion 24 of the member has its lower face circumferentially recessed, as shown at 32, and is provided with a plurality of uniformly spaced radially arranged grooves or recesses 33, of rectangular cross-section; said receses define a plurality of guideways for as many elements which fit the recesses and are mounted in the same for sliding movement longitudinally thereof, along the upper surface of the table HI.

Each element 35 has at its rear an integral extension 36 projecting into the recessed portion 22 of the member [5 on top of the cam 25, which extension has secured thereto a cam follower 3'! projecting therefrom into the cam groove 30.

As will be apparent, the elements 35 being in this manner operatively associated with the cam 25 are displaced thereby, during the rotation of the member l6, radially of said member along the guideways 33 between an innermost and an outermost position shown respectively in Figs. '33 and 3A. To insure smooth operation, all the contacting surfaces are accurately machined and suitable lubricating means are provided.

The recess 32 in the lower face of the annular portion 24 of the member i6 is adapted partially to receive a ring 44, which extends outwardly of the periphery of the member [6 as shown in Fig. 2, the ring being secured to and carried by the member l6 flush with the lower face of the latter, by means of a number of screws passing through threaded holes 46 in the annular portion 24 of the member Hi. The ring 44 is provided with a plurality of radially extending grooves or guideways 41 spaced from each other by the same angular intervals as the recesses 33.

Said guideways (see Figs. 11, 14, 15) comprise ledge-defining side groove portions 48, and a deeper center groove portion 49 the depth whereof is such as to define a bottom wall in the ring of a thickness corresponding to that of a wing of a slider 5! (of the type shown in Figs. 4, 5) and the width whereof is substantially equal to the width of the slider wing measured inwardly of the side flanges 52 thereof. At the outer end of each guideway, for about one-fourth of its length, the bottom wall aforesaid is cut away and the side walls of the guideway are undercut and rounded ofi to define a recess 54 having a contour corresponding to the outer contour of a wing of a slider, so that a partially folded slider placed on the table ill, with one of the wings 50 entered into said recess in abutment with the end of the bottom wall aforesaid, as indicated in broken lines in Fig. 10, will be held therein in a predetermined position for the purpose hereafter apparent. In the assembled condition of the ring 44 and member l6 described, the guideways 41 of the ring are co-axial with the recesses 33 of the member to which they also correspond in width and into which they partiall extend, the aforementioned recesses 54 being then located outwardly of the periphery of the member I5 and freely accessible.

Each element 35 is undercut at the outer portion of its base to provide therein a recess 56 permitting movement of the element to the outermost position thereof (as best shown in Fig. 11) without interference by the ring 44. Said recess 56 is furthermore intended to receive portions of an element 50, hereinafter termed an arbor which is secured to the elements 35 as by means of a screw 5! passing through the element and insertable through a slot 52 formed at the periphery of the member [6 in the top wall of the recess 33. The arbor 6|], which therefore functions as a unit with the element 35, is slidably mounted on the guideway 41 of the ring 44 for longitudinal reciprocation therealong simultaneously with the actuation of the element 35. The arbor comprises (see Figs. 12-15) an elongated body 63 having at its inner end an arbor-locating projection 64 and a threaded hole 65 for the screw 6|; parallel wings 61 extend along the opposite sides of the body 83. Said wings rest on the ledge-defining side groove portions 48 of the guideway 41, while the portion of the body underneath the wings i slidably received in the center groove portion 49.

The body 63 of the arbor 65, which is of substantially rectangular cross-section, precisely fits the groove portion 49 and has therefore a width just slightly less than the width of the wing of the slider measured between the side flanges thereof; the thickness of said body is made substantially equal to the distance between the opposed inner faces of the slider wings required in the finished slider. The wings 51 of the arbor (which have a width corresponding to that of the side groove portions 48), are of a thickness substantially equal to the distance that will exist between the side flanges 52 0f the opposed slider wings in the finished slider, and the sloping forward end of the arbor is provided with a slot 58 adapted to accommodate the neck portion 59 of the slider.

As illustrated in Figs. 2, 3A, 3B, the stationary cam 25 on the base plate i5 is profiled to retain the slidable elements 35 and therefore the arbors 6B in an innermost or retracted position in the circular member IE, when said elements and arbors are at the front of the machine as seen in Fig. 2. In this retracted position, the arbors leave the aforementioned recesses 54 at the outer ends of the guideways 41 entirely exposed, so that the sliders 5| may be entered into said recesses by manual feeding or other suitable means, with one of the wings 50 resting on the table II) in horizontal position and the other Wing em,- bodying the usual bail-attaching lug 53 extending upwardly at an angle thereto. Inthe rotation of the member 56 during operation of the machine, the cam gradually causes radial outward movement of the elements and arbors 60 relative to the member I6, while elements and arbors are carried by the member in a circular path, until the arbors are moved to an outermost or operative position in which they overlie the recesses 54 of the guideways 41 with their forward slotted end 68 projecting therefrom.

This outermost position is reached when the arbors arrive at a predetermined point at the back of the machine at which the bending of the sliders takes place, after which the arbors are caused gradually to move again to their retracted position. Actually, the cam 25 is so profiled as to cause the'arbors to remain substantially in their retracted position during their travel throughout the half circle defined by the diameter perpendicular to the diameter pass,- ing through the bending point, whereby a plurality of recesses 54 will be exposed at the same time for simultaneous feeding of a plurality of sliders, and to cause the arbors to move to their outermost position and return to their retracted position substantially within the half circle including the point of bending, whereby to permit discharge of the finished sliders at a point suitably spaced from the feeding point.

The partially folded sliders 5| fed to the recesses 54 of the guideways 41, as aforementioned, are transported thereby along a circular path in a clockwise direction to the point of bending, during which movement they are also guided by plates 72, i3 fixed to the table I0 and extending from the front of the machine to the point'of bending, which provide curved edges slightly spaced from the ring 44 substantially preventing movement of the sliders on the plate 10 out of the recesses 54.

As the bottom wall of the guideways 41 has a thickness substantially equal to that of awing of a slider, and the body 63 of the arbors has a width substantially corresponding to the width of a slider wing measured between the side flange thereof with suitable tolerances, as aforesaid, it will be evident that the body of each arbor, while being moved to its outermost position, will gradually enter the slider located in the respective recess 54 and extend over the slider win resting on the horizontal table I 0 close to the upper face and between the side flanges thereof; further in its outermost position, the arbor will completely overlie the slider wing and receive theneck 69 of the slider within its slotted end portion 68. Therefore, the slider will be held against vertical displacement by the table I0 and the arbor 60, and against lateral displacement by the :peripheral walls of the recess 54'and the arbor. The edge of the plate 13 prevents any objectionable outward movement of the slider resulting from thrusts that might be exerted thereon by the arbor while entering the slider.

The slider thus held by the arbor is subjected at thebending point to the action of a suitable vertically reciprocable punch 16, which engages the upwardly extending free wingof the. slider and-displaces the same relative to the engaged wing to a position parallel to this latter, thereby deforming the slider to the. final shape shown in Figs. Sand 11. The punch 16 is suitably shaped in relation to the conformation of the slider wing to .exert proper pressing action, and specifically is providedwith a recess 11 to accommodate the bail-attaching lug 53 and avoid deformation. thereof. To prevent outward displacement-of the slider relative to the arbor under the action, of the punch, there is provided a horizontally reciprocable finger which is actuated simultaneously with the punch 16 into abutment: with. the end. of the arbor and with the neck; 69., of the slider, in the. manner hereinafter described. 7

It is; apparent from the foregoing that the displacement of the free wing of the slider is positively controlled; and limited to the ,amount required; toobtain the desired parallel relationship of the wings, by virtue of the described conformation and dimensions of the body of the arbor itself functioning as an anvil; in addition, the wings 51 of the arborwhich project laterally of the: body thereof and are interposed between the side flanges of. the opposed slid-er wings at the time of bending, provide further means for controlling the displacement of the slider wing, since their thickness corresponds to the final distance between said side flanges.

, After the bending operation, the sliders remain on the arbors, which they envelop, within the recesses 54 of the guideways 41, and are carried along the table In to the entrance opening 82 of a discharge chute 83 provided inthe table and extending underneath the ring 44 (Fig. 2). At this point, the arbors will havesubstantially completed their return movement to the retracted position, and the sliders will therefore be allowed normally to fall by gravity into the chute.

, The member [6 is intermittently rotated to actuate the; structure described from the ratchet wheel 20,] which in turn isactuated by a pawl 86 fixed to a plate 81 horizontally reciprocated by a .feed bar, to which the. plate is secured as'by meansof screws 89 (Fig. 2). The bar 88 is slidably mounted in tracks 90 secured to a fixed supporting plate 91, and is actuated by a bell crank 92,..which is pivotally mounted on a bracket 93 secured to an extension 94 of the table I 0 and engages a stud 95.01" the bar with its bi.- furcatedlower end (Fig. 1). The bell crank is rocked to reciprocate the feed bar through suitable conventional connecting means, such as shown, at 96 in Fig. 1, from a crank shaft 91 driven, in any suitable manner and mounted, for instance, in the head 98, of a standard press, to whichpress the tab-1e ID' may also be secured, as hereinbeforementionedl Thepunch 76,,is carried by a horizontal arm 99 whicnis secured, asby screws I00, to a sup.- porting member. 1M vertically reciprocated to actuate the arm and the punch by the ram H12 of the; press,.,within which ram the shank of the member is received and securedas at [03. The arm. 99 is. curved,.:and carries at its free end an adjustable. finger I04 above the opening 82 of the discharged chute 83, which finger is adapted to engage sliders overlying the opening 82 at the end of the downward stroke of the arm 99, to insure discharge of the sliders shouldthese latter fail for any reason to fall by gravity through the opening.

The arm 99 also carries a dependent downwardly extending plunger I06 for actuating the retaining horizontally reciprocable finger 80.

This latter is mounted on the table In in a track formed by a grooved member I01 suitably fastened to the table, and is provided at its rear end with a slot I08 shaped as shown in Fig. 3A. The plunger I06 comprises a vertical portion Hi9 followed by an angularly extending portion l in defining a cam surface, and by a lower vertical portion il l, offset relative to the portion I08, which extends through an opening H2 in the pawlcarrying plate 31 secured to the feed bar 88. In the uppermost portion of the arm 99, in which the bending punch is inactive, the offset lower portion H! of the plunger I extends through the slot N8 of the finger 80 and maintains the same in rearward position away from the adjacent arbor 60; however, during the downward movement of the arm 99, the cam portion H0 of the plunger will enter the slot I08 and displace the finger to a forward position as shown in Fig. 6 into abutment with the arbor 60 and the neck of a slider carried thereby, simultaneously-with the descent of the bending punch 16, so that the finger'may exert its slider retaining function during the slider bending operation.

The teeth of the ratchet wheel 20 are suitably arranged to cause rotation of the member IE3, at each actuation by the pawl 86, by an amount equal to the angular interval between two successive guideways -41 of the ring 44, so that the sliders on the arbors 66 will be successively presented to the punch 16. Further, the means for actuating the feed bar 88 are suitably arranged to cause said bar to perform its forward feeding stroke to operate the ratchet through the plate 81 and the pawl 86, during the punch-carrying arm 953, and to cause the bar to perform its return stroke (during which the pawl 86 slides along the ratchet wheel without displacing the same) during the downward movement of the arm 99, whereby to maintain the ratchet wheel stationary at the time of the action of the punch. A suitable brake, not shown, is preferably upward movement of the y provided on the crankshaft 91 to control the rotation of this latter.

In order to prevent any accidental movement of the member i6 and associated elements during the bending operation, that might result in an unsatisfactory operation and jamming of the machine, a safety locking device I I4 is provided (Fig. 2) Said device is fastened to the table l0 and incorporates a slidably mounted element I I6 biased by a suitable spring to an outermost position wherein it partially projects from the body of the device into the recess 54 at the end of'one of the guideways 41 of the ring 44 to prevent accidental movement of the ring, the device being located immediately after the point of discharge of the sliders, that is at a-point where the arbors have already been returned to their retracted position so as to free the recesses 54, but no sliders are contained therein. However, the projecting portion of the element I I6 is so shaped in relation to the walls of the recesses 54 and the strength of the biasing spring is such that the element 1 I6 is caused to be axially displaced against the'spri'ng to release the ring when the rotary assembly including the ring is positively driven by the ratchet wheel 20.

It is understood that changes and modifications may be made in the structures described and illustrated in the drawings without departing from the spirit of the invention or exceeding the scope of the claims.

I claim:

1. In a machine for bending preformed partially folded sliders for slide fasteners, rotatable means for transporting sliders in succession from a point of feeding to a point of bending, a reciprocable punch acting on the sliders at the point of bending to deform the same to a predetermined final shape, and anvil members mounted for movement conj ointly with and relative to said rotatable means and displaceable from a retracted position at the point of feeding of the sliders to an operative position at the point of bending of the sliders in which latter position said members extend between the wings of the transported sliders to provide surfaces limiting the deformation of the sliders by the punch to the amount required to define said final shape of the sliders.

2. In a machine for bending preformed partially folded sliders for slide fasteners, rotatable means for transporting sliders in succession from a point of feeding to a point of bending, said rotatable means embodying peripheral portions adapted to receive and retain the sliders, a reciprocable punch acting on the sliders at the point of bending to deform the same to a predetermined final shape, anvil members mounted for movement conjointly with and relative to said rotatable means and displaceable from a retracted position at the point of feeding of the sliders from a retracted position relative to said slider-receiving portions at the point of feeding of the sliders to an operative position at the point of bending in which latter position said members extend between the wings of the transported sliders retained in the slider-receiving portions to provide surfaces limiting the deformation of the sliders by the punch to the amount required to define said final shape of the sliders, and means for preventing displacement of the sliders relative to the anvil members during the deformation thereof.

,3. In a machine for bending preformed partially folded sliders for slide fasteners, a table, a rotatable structure on said table having a plurality of recessed portions, each conformed to receive a wing of a slider placed on the table, for retaining and transporting sliders in succession from a point of feeding to a point of bending during rotation of the structure, a plurality of members mounted in the rotatable structure for movement therewith and displacement therein relative to said recessed portions between a retracted position at the point of feeding of the sliders and an operative position at the point of bending in which the members extend between the wings of the sliders retained by the recessed portions, and reciprocable means for engaging the free wings of the sliders at the point of bending to deform the sliders to their predetermined final shape, said members having surfaces adapted to limit the deformation of the sliders to the amount required for the attainment of said final shape thereof.

4. In a machine for bending preformed partially folded sliders for slide fasteners, a table, a rotatable structure on said table having a plurality of recessed portions, each conformed to receive a wing of a slider placed on the table, for

retaining and transporting sliders in succession from a point of feeding to a point of bending during rotation of the structure, a plurality of members mounted in the rotatable structure for movement therewith and displacement therein relative to said recessed portions betweena retracted position at the point of feeding of the sliders and an operative position at the point of bending in which the members extend between the wings of the sliders retained by the recessed portions, vertically reciprocable means engaging the free wings wings of the sliders of the sliders at the point of bending to deform the sliders to their predetermined .flnal shape, said members having surfaces adapted to limit the deformation of the sliders to the amount required for the attainment of said final shape thereof, and means for preventing displacement of the sliders relative to the members under the action of said slider deforming means.

5. In a machine for bending preformed partially folded sliders for slide fasteners, a fixed horizontal table, a rotatablev structure on said table having a plurality of peripheral recessed portions, each conformed to receive a wing ofra slider placed on the table, for retaining and transporting sliders in succession from a point of i feeding to a point of bending during rotation of the structure, a plurality of members mounted in the rotatable structure for movement therewith and displacement therein relative to said recessed portions between a retracted position at the point of feeding of the sliders and an operative position at the point of bending in which the members extend between the Wings of the sliders retained by the recessed portions, a vertically reciprocable punch for engaging the free at the point of bending to deform the sliders to their predetermined final shape, said members having surfaces adapted to limit the deformation of the sliders to the amount required for the attainment of said final shape thereof, a horizontally reciprocable finger movable to a position for preventing displacement of the sliders relative to the members under the action of said slider deforming punch, and means for actuating the rotatable structure, the punch and said horizontally reciprocable finger in predetermined time relation.

6. In a machine for bending preformed partially folded sliders for slide fasteners, a table, a rotatable structure on said table having a plurality of recessed portions, each conformed to receive a wing of a slider placed on the table,*for retaining and transporting sliders in succession from a point of feeding to a point of bending durin rotation of the structure, a plurality of members mounted in the rotatable structure for movement therewith and displacement therein relative to said recessed portions between a retracted position at the point of feeding of the sliders and ail-operative position at the point of bending in which the members extendbetween the wings of the sliders retained by the recessed portions, and a reciprocable punch for engaging the free wings of the sliders at the point of bending to deform the sliders to their predetermined final shape, said members embodying anvil surfaces eomplemental to inner surfaces of the wings of the sliders defining the relative position of said wings in the finally shaped sliders.

, '7. A machine for bending preformed partially folded sliders for slide fasteners comprising a fixed table, a rotatable assembly on said table having a plurality of peripheral recessed portions, each conformed to receive a wing of a slider placed on the table, for retaining. and transportdisplaceable therein relative to said recessed portions between a retracted position at the point of feeding of the sliders and an operative position at the point of bending-in which the members extend between the wings of the sliders retained by the recessed portions, fixed cam means deformation of the on said table, means operatively connecting said cam means to said members for actuating the same in the rotation of the assembly, and reciprocable means for engaging the free wings of the sliders at the point of bending to deform the sliders to their predetermined final shape, said members having surfaces adapted to limit the sliders to the amount required of said final shape thereof.

8. A machine for bending preformed partially folded sliders for slide fasteners comprising a fixed table, a rotatable assembly on said table having a plurality of peripheral recessed portions, each conformed to receive a wing of a slider placed on the table, for retainingand transporting sliders in succession from a point of feeding to a point of bending during rotation of the assembly, a plurality of members mounted in the rotatable assembly for movement therewith and displaceable therein relative to said recessed portions between a retracted position at the point of feeding of the sliders and an operative position at the point of bending in which the members extend between the wings of the sliders retained by the recessed portions, fixed cam means on said table, :means operatively connectin said cam means to said members for actuating the same in the rotation of the assembly, a reciprocable punch for engagingthe free wings of the sliders at the pointer bending to deform the sliders to their predetermined final shape, said members having surfaces adapted to limit the deformation of the sliders to the amount required for the attainment of said final shape thereof, a reciprocable finger movable to a position for preventing displacement of the sliders relative to the members during deformation thereof, and means for actuatin the rotatable assembly, said punch and said finger in predetermined timerelation.

9. A machine for bending preformed partially folded sliders fOr slide fasteners having wings at an angle to oneanother comprising a fixed horizontal table, a rotatable assembly on said table having a plurality of peripheral recessed portions, each conformed to receive a wing of a slider horizontally supported by the table, for retaining and transporting sliders in succession from a point of feeding to a point of bending during rotation of the, assembly, a plurality of members mounted in the rotatable assembly for movement therewith and displacement therein relative to said recessed portions between a retracted position at the point of feeding of the sliders and an outermost position at the point of bending in whichthe members extend between the wings of the slidersrin the recessed portions aforesaid in retaining relationship to the wings horizontally supported by the table, and a vertically reciprocable punch for engaging the angularly extending free wings of the sliders at the point of bending and displacing the same into parallel relationship to the wings retained by the members. v i

10. A machine for bending preformed partially folded sliders for slide fasteners having wings at an angle to one another comprising a fixed horizontal table, a rotatable assembly on said table for the attainment having a pluralityof peripheral recessed portions, each conformed to receive a wing of a sliderhorizontally supported by the table, for retaining and transporting sliders in succession from a point of feeding to a point of bending during rotation of the assembly, a plurality of members mounted in the rotatable assembly for movement therewith and displacement therein relative to said recessed portions between a retracted position at the point of feeding of the sliders and an outermost position at the point of bending in which the members extend between the wings of the sliders in the recessed portions aforesaid in retaining relationship to the wings horizontally supported by the table, and a vertically reciprocable punch for engaging the angularly extending free wings of the sliders at the point of bending and displacing the same relative to the wings retained by the members, said members embodying surfaces limiting the displacement of the free wings to a position parallel to theretained wings defining the final desired shape of the sliders.

11. A machine for bending reformed partially folded sliders for slide fasteners having wings at an angle to one another comprising a fixed horizontal table, a rotatable assembly on said table having a plurality of peripheral each conformed to receive a wing of a slider horizontally supported by the table, for retaining and transporting sliders in succession from a point of feeding to a point of bending during rotation of the assembly, mounted in the rotatable assembly for movement therewith and displacement therein relative to said recessed portion between a retracted position at the point of feeding of the sliders and an outermost position at the point of bending in which the members extend between the wings of the sliders in the recessed portions aforesaid in retaining relationship to the wings horizontally supported by the table, a vertically reciprocable punch for engaging the angularly extending free wings of the sliders at the point of bending and displacing the same relative to the wings retained by the members to deform the sliders to their predetermined final shape, and a horizontally re ciprocable finger movable into abutment with the members to prevent outward displacement of the sliders relative to the members under the action of the slider deforming punch.

12. A machine for bending preformed partially folded sliders for slide fasteners comprising a fixed table, a rotatable structure on the table for transporting sliders in succession from a point of feeding to a point of bending, said structure embodying a plurality of radial guideways extending to the periphery of the structure each having an end portion conformed to receive and retain a wing of a slider supported by the table, a plurality of members mounted in said guideways for displacement therein, during rotation of the structure, between a retracted position relative to said end portions of the guideways at the point of feeding of the sliders and an outermost operative position at the point of bending in which the members extend between the wings of the sliders retained by said end portions, a reciprocable punch for engaging the free wings of the sliders at the point of bending to deform the sliders to their predetermined final shape, said members having surfaces adapted to limit the deformation of the sliders to the amount required for the attainment of said final shape thereof, and a reciprocable finger movable into association with the end portions of the guideway at the point of bending to prevent displacement of the sliders relative to the members under the action of the slider-deforming punch.

13. A machine for bending preformed partially folded sliders for slide fasteners comprising a recessed portions, 5

a plurality of members ment of 12 fixed horizontal table, a rotatable structure on said table for transporting sliders in succession from a point of feeding to a point of bending, said structure embodying a plurality of radial guideways extending to the periphery of the structure each having an end portion conformed to receive and retain a wing of a slider supported by the table, a plurality of anvil members slidable in said guideways, cam means fixed to the table, means operatively connecting said cam means to said members to cause the members to be displaced, during rotation of the structure, be tween a retracted position relative to said end portions of the guideways at the point of feeding of the sliders and an outermost operative position at the point of bending in which the members extend between the wings of the sliders retained by said end portions, a vertically reciprocable punch for engaging the free wings of the sliders at the point of bending to deform the sliders to their predetermined final shape, said anvil members embodying surfaces complemental to inner surfaces of the wings of the sliders defining the relative position of said wings in the finally shaped sliders, a horizontally reciprocable finger movable into association with the end portions of the guideways at the point of bending to prevent displacement of the sliders relative to the anvil members under the action of the slider-deforming punch, and means for actuating the rotatable structure, the punch and said finger in predetermined time relation.

14. A machine for bending preformed partially folded sliders for slide fasteners comprising a fixed horizontal table, a circular element rotatably mounted on said table, a ring secured to the periphery of said element in juxtaposition to the table, a plurality of radial guideways extending through said ring each having an end portion conformed to receive and retain a wing of a slider supported by the table, to transport sliders in succession from a point of feeding of the sliders to a point of bending during rotation of the ring, a plurality of anvil members slidable in said guideways, cam means fixed to the table, a central recess in the circular element for accommodating said cam means, radial grooves in the element alined with the guideways of the ring, means extending through said grooves operatively connecting said cam means to said anvil members to actuate these latter, in the rotation of the circular element and ring, between a retracted position relative to said end portions of the guideways at the point of feeding of the sliders and an outermost operative position at the point of bending in which the members extend between the wings of the sliders retained by said end portions, a reciprocable punch for engaging the free wings of the sliders at the point of bending to deform the sliders to their predetermined final shape, said members having surfaces adapted to limit the deformation of the sliders to the amount required for the attainsaid final shape thereof, and a reciprocable finger movable into association with the end portions of the guideway at the point of bending to prevent displacement of the sliders relative to the members under the action of the slider-deforming punch.

LOUIS M. RABINOWITZ.

No references cited. 

